Priesthood

Peszkowski left the army following World War II and was ordained a Roman Catholic priest.[1] He
became a leading advocate for the remembrance of the Katyn massacre
and the murder of Poles
elsewhere in the country during the war. He also became a chaplain
for Polish families of the Katyn massacres.[1] He
preached forgiveness for the perpetrators of Katyn. He called for
forgiveness for those who killed Polish army officers during a
speech at Warsaw's Unknown Soldiers' Grave in
1995.[1]